CS263073B1 - Process for producing a liqueur - Google Patents

Abstract

The composition is made from acetal fatty acid condensates containing 17 to 40% by weight of fatty acids by reaction with lsobutyl stearate in a weight ratio of 100: 5 to 100: 25 at a temperature of 80 ° C to 110 ° C.

Description

(54)

Process for producing a clearing agent

The composition is prepared from acetal fatty acid condensates containing 17-40% by weight fatty acids by reaction with lsobutyl stearate in a weight ratio of 100: 5 to 100: 25 at a temperature of 80 ° C to 110 ° C.

265073 (52) Int Cl *

OJ C 14 C 9/02

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The present invention relates to a process for the manufacture of a tanning dressing agent, in particular for the tilling of white leather.

One of the basic requirements, especially for white leather, is the high fastness of these leather. This light-fastness is achieved, inter alia, by means of liquefaction.

Various types of thickeners are used, predominantly synthetic or semi-synthetic, which are produced by esterifying fatty acids with fatty alcohols or by mixing synthetic esters with lubricants of predominantly animal origin such as lanolin, semen oil, hoof oil, optionally succinic acid or stearic acid.

Acetal condensates of fatty acids, which are prepared by the condensation of fatty acids with formaldehyde and polyols, are one of the raw materials suitable for the production of the liquor.

Synthetic esters or mixtures thereof are further suitable raw materials for the production of the flavoring agent. Synthetic surfactant-emulsified esters, however, form an emulsion of 3 to 8 times larger particles than desired. Neither of these raw materials can be used

-from 265 075, the procedures should be adapted to produce a satisfactory tannery

a liquefying agent which satisfies the requirements for its stability, lubricating effect, bleaching effect and in particular for ensuring the lightfastness of the leather.

It is an object of the invention to overcome these drawbacks. This is achieved by a process for the production of a liquefying agent, the principle of which is that acetal condensates of fatty acids of the general formula

R-COO C ₂ H ₄ O (C ₂ H ₄ O) _x C ₂ H ₄ OCH ₂ O _n H, wherein R represents an aliphatic alkyl of 6 to 30 carbon atoms, x is a number from 0 to 10 and n is a number 1 6 to 6, containing 17 to 40% by weight of fatty acids, are reacted with isobutyl stearate in a weight ratio of 100: 5 to 100: 25 at a temperature of 80 ° C to 110 ° C.

Preferably, the reaction is carried out at 80 ° C to 85 ° C. Preferably, isobutyl stearate containing 10% by weight of dibutyl phthalate is used.

The process of the invention is simple and easy to carry out. A permanent freeze-drying agent is obtained which has good lubricating properties and which, in particular, ensures the light-fastness of the leaked leather.

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The process for the production of the clearing agent is apparent from the following examples.

Example 1

100 parts of acetal condensate containing 17% by weight of fatty acids and 10 parts of isobutyl stearate are metered into a duplicator condensation boiler (preferably of stainless steel or enamelled) equipped with a stirrer and a connected water pump to remove condensation vapors and reaction water. The mixture of the reactants is slowly heated with stirring at 80 ° C for 3 hours with constant removal of condensation vapors and reaction water.

The resulting product is a clear, yellowish, oily liquid, readily soluble in both hot and cold water, stable in electrolytes and aqueous solutions over a wide pH range.

Example 2

100 parts of acetal condensate containing 17% by weight of fatty acids and 15 parts of dibutyl phthalate-modified isobutyl stearate in an amount of 10% by weight are metered into a duplicator condenser.

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The mixture is heated at 80 ° C to 85 ° C for 3 hours with constant stirring and removal of condensation vapors and reaction water. The resulting product is a clear yellow, clear, oily liquid with very good solubility in hot and cold water, stable even in electrolytes.

Example 3

The white leather dressing agent was prepared in the same manner as in Example 1 from 100 parts acetal condensate containing 19.5% by weight of fatty acids and 20 parts isobutyl stearate. A dark yellow product with good solubility, stable in water and in electrolytes, was obtained.

Example 4

100 parts of acetal condensate containing 19.5% by weight of fatty acids and 15 parts of isobutyl stearate modified with 10% by weight of dibutyl phthalate were used. The production method was the same as in Example 1.

A dark yellow product was obtained, stable in both aqueous solutions and electrolytes.

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Example 5

In the manner described in Example 1, a liquor was prepared from 100 parts acetal condensate containing 40% by weight of fatty acids and 10 parts isobutyl stearate. A light brown product with similar properties to Example 1 was obtained.

Example 6

The process described in Example 1 prepared a 100 g acetal condensate containing 40% by weight of fatty acids and 25 parts of isobutyl stearate modified with dibtyl phthalate. A clear, light brown product was obtained with similar properties to the flavoring agent in Example 1.

The clearing agent produced in the manner described was subjected to tests to compare the light fastness of the leather to the two foreign clearing agents used hitherto under the following conditions:

The comparative liquids were applied in an amount of 8% by weight, based on the sheared weight of the leather. Irradiation of flaxseed leather was performed with a silicon lamp, with 1 hour exposure corresponding to 8 hours exposure to sunlight. The evaluation was performed according to the international gray scale. The higher the value given in the table, the higher the light fastness of the leather treated with the respective de-icing agent.

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Table

Exposure time (h)

6 10 24 30 48 Device:.

Pelgrassol CS

Pelgrassol NG-59 liqueur produced according to the invention

5 4.5 3 3 5 5 5 4 4

4.5 4 4

Note:

Pelgrassol CS is a sulfochloride aliphatic hydrocarbon based product.

Pelgrassol NG-59 is a sulfochloride based aliphatic hydrocarbon formulation with special softening agents.

From the above table, it follows that the refining composition produced by the process of the present invention surpasses comparable foreign compositions in light fastness after application, especially after long exposure times.

The production method can be used in all plants producing clearing agents.

Claims (3)

SUBJECT MATTER 1. A process for producing likrovaoxho means, characterized in that the acetal condensates of fatty acids of formula R-COO [C ₂ H ₄ O (C ₂ H ₄ O) _x C ₂ H ₄ OCH ₂ oJ _n H wherein R represents an aliphatic alkyl with 6 to 30 carbon atoms, X is a number from 0 to 10, and n is a number from 1 to 6, containing 17 to 40% by weight of fatty acids, are reacted with isobutyl stearate in a weight ratio of 100: 5 to 100: 25 at 80 ° C to 110 ° C. 2. The process of claim 1, wherein the temperature is maintained between 80 ° C and 85 ° C. 3. Process according to claim 1 or 2, characterized in that isobutyl stearate containing 10% by weight of ibutibutyl phthalate is used.